Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
1998-05-20
2001-10-16
Chin, Wellington (Department: 2733)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S353000, C370S354000, C370S355000, C370S356000
Reexamination Certificate
active
06304565
ABSTRACT:
TECHNICAL FIELD
This invention relates to a method of completing a call to a called party whose telephone line is being used for an Internet telephony call or a connection to the Internet.
BACKGROUND OF THE INVENTION
Use of the Internet has increased dramatically in the past several years. There has been a tremendous explosion in its use by both adults and children from the home environment for retrieving information, making transactions for the purchase of advertised goods and services, engaging in chat room conversations, and general browsing or “surfing the Net”, as it is commonly known. These activities have replaced television-viewing in many households. Access to the Internet is most frequently provided to a user's terminal through an Internet Service Provider (ISP), which can be accessed by the user over the user's Plain Old Telephone Service (POTS) connection through their Local Exchange Carrier (LEC). The Internet has also become a medium over which telecommunications can take place using what is known as Internet Telephony. With respect to the latter, telecommunication takes place via a terminal or a telephone set over an IP Telephony Network (ITN) rather than the Public Switched Telephone Network (PSTN). In an ITN, voice signals are transmitted via digital IP voice packets rather than via circuit-switched digital voice signals, as on the PSTN. Gateways at each end of the IP telephony call interconnect the PSTN and the ITN and translate voice signals into packets for transmission on the ITN and packets into voice signals for transmission on the PSTN.
With such a time-intensive use of one's telephone line for Internet-related activities, an incoming telephone call directed to such a heavy Internet user's telephone number will have great difficulty in being completed. In fact, it is not uncommon for a calling party to experience a busy signal for hours on end as he or she attempts to reach a household where the telephone line is kept busy with such activities. Eventually a calling party's frustration becomes disgust and he or she gives up in their attempt to reach their intended called party, with a loss of revenue to the telephone company for the incomplete call. The recent flat-rate pricing by several major Internet Service Providers has even exacerbated the problem since users have no financial incentive to minimize their time connected to an Internet Service Provider. Various solutions to this problem have been proposed. An obvious solution for the heavy Internet user is to subscribe to a separate telephone line that can be used exclusively for Internet telephony and other Internet-related activities. The disadvantage, of course, is the extra monthly cost incurred by the subscriber for the additional telephone line. In co-pending patent application Ser. No. 08/562,678, filed Nov. 27, 1995, a method is disclosed for completing a call over an IP Telephony network. The disclosed method relies on subscribing to call waiting/call forwarding features on the telephone line and depends on a remote access call forwarding capability. In co-pending patent application Ser. No. 08/625,963, filed Apr. 1, 1996, an Internet on-hold method is disclosed in which the telephone network, upon receipt of an incoming call to an Internet-busy telephone line, informs the ISP serving the called party of the incoming call and, upon acceptance by the called party, places the Internet call on hold and forwards the incoming call to the called party over the PSTN onto the telephone line to the called party.
A methodology is desirable that enables a called party to receive an incoming call while his or her POTS telephone line is busy on an Internet-related activity, such as an IP Telephony conversation or “surfing the Net”, and which methodology does not require call waiting/call forwarding or Internet-on-hold features on the telephone line.
SUMMARY OF THE INVENTION
In accordance with the present invention, when a calling party calls a called party on the PSTN, a database that is common to both the PSTN and an Internet Protocol (IP) network, is accessed to determine whether the telephone line of the number being called is currently active on the IP network. That database maintains a record for each user who is currently active on the IP network through an Internet Service Provider. In addition, each record contains information identifying the particular user logged into the network on that line, an indication whether the telephone line is IP telephony capable, an indication whether that line is currently active on an IP telephony call, and the IP telephony feature set subscribed to by the called party on that line. If the telephone line is active, IP telephony capable, currently active on an IP telephony call, and the called party subscribes to a call waiting-on-IP feature, then the incoming call can be forwarded as an IP telephony call to the called telephone line if the called party agrees to accept the incoming call and places his current IP telephony call on hold. If the called party does not subscribe to a call waiting-on-IP feature but subscribes to a call forwarding-on-IP feature, the incoming call can be directed to an alternate destination on either the IP network or on the PSTN, such as a voice mail or message service. If the called party is currently active on the IP network, has an IP telephony capability, but is not currently active on an IP telephony call, which is the common scenario when the called party is browsing, then the called party is alerted to the incoming telephone call via a message on his terminal. The called party can then elect to accept the incoming call, and the call is completed through the ITN to the called party as an Internet telephony call regardless whether or not the called party subscribes to a call waiting-on-IP feature. If the called party is currently active on the IP network through an ISP, but does not have an IP telephony capability, then the PSTN can forward a message to the ISP which will push a message to the called party to inform him of the incoming call. The incoming call can then be directed onto the IP network to a messaging service, or on the PSTN to a voicemail service, or to an alternate telephone number, such as a cellular phone, for pickup by the called party. In all cases, if the called party rejects the incoming telephone call, a busy signal is returned to the calling party.
REFERENCES:
patent: 4995074 (1991-02-01), Goldman et al.
patent: 5274700 (1993-12-01), Gechter et al.
patent: 5363431 (1994-11-01), Schull et al.
patent: 5428608 (1995-06-01), Freeman et al.
patent: 5533110 (1996-07-01), Pinard et al.
patent: 5712907 (1998-01-01), Wegner et al.
patent: 5724412 (1998-03-01), Srinivasan
patent: 5742596 (1998-04-01), Baratz et al.
patent: 5751706 (1998-05-01), Land et al.
patent: 5768513 (1998-06-01), Kuthyar et al.
patent: 5870565 (1999-02-01), Glitho
patent: 5894504 (1999-04-01), Alfred et al.
patent: 5896444 (1999-04-01), Perlman et al.
patent: 5916302 (1999-06-01), Dunn et al.
patent: 5946381 (1999-08-01), Danne et al.
patent: 6011909 (2000-01-01), Newlin et al.
patent: 6075783 (2000-06-01), Voit
patent: 6219413 (2001-04-01), Burg
patent: WO 95/18501 (1995-07-01), None
patent: 0758175A1 (1997-02-01), None
patent: WO 97/14238 (1997-04-01), None
patent: WO 97/16007 (1997-05-01), None
patent: WO 97/37483 (1997-10-01), None
patent: WO9747118 (1997-12-01), None
patent: WO 98/01985 (1998-01-01), None
patent: WO 98/52332 (1998-04-01), None
patent: WO 98/52339 (1998-05-01), None
Hewlett Packard The Internet Telephony Red Herring, 1996, 15pages.
International Switching Symposium, Oct. 25-30, 1992, vol. 2, 32 pages.
Babbage et al, Internet Phone—Changing the Telephony Paradigm, 17 pages.
AT&T Corp.
Chin Wellington
Pham Brenda H.
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